Direct measurement of the branching fraction for the decay of D+→K¯0e+νe and determination of Γ(D0→K−e+νe)/Γ(D+→K¯0e+νe)

M Ablikim,J Z Bai,Y Ban,J G Bian,Xu Cai,J F Chang,H X Chen,J C Chen,M L Chen,Y B Chen,S P Chi,Y P Chu,X Z Cui,H L Dai,Y S Dai,Z Y Deng,L Y Dong,S X Du,Z Z Du,J Fang,S S Fang,C D Fu,H Y Fu,C S Gao,Y N Gao,M Y Gong,W X Gong,S D Gu,Yu Qiang Guo,K L He,Min He,Xinyi He,Y K Heng,H M Hu,T Hu,Lin Huang,X P Huang,X B Ji,Q Y Jia,C H Jiang,X S Jiang,D P Jin,S Jin,Ying Jin,Y F Lai,Fei Li,Gang Li,H H Li,J C Li, Q J Li,R Y Li,S M Li,W G Li,Xiao Song Li,Y F Liang,H B Liao,C X Liu,Feng Liu,H M Liu,J B Liu,R G Liu,Z A Liu,Feng Lu,G R Lu,J G Lu,C L Luo, X L Luo,F C Ma,J M Ma,L L Ma,Q M Ma,X Y Ma,Z P Mao,X H Mo,Jing Nie,Z D Nie,H P Peng,N D Qi,C D Qian,Hongyan Qin,J F Qiu,Z Y Ren,G Rong,L Y Shan,Li Shang,D L Shen,X Y Shen,H Y Sheng,F Shi,Xiao Shi,H S Sun,S S Sun,Y Z Sun,Z J Sun,X Tang,N Tao,Y R Tian,G L Tong,D Y Wang,J Z Wang,Kun Wang,L S Wang,Minzu Wang,P L Wang,S Z Wang,W F Wang,Y F Wang,Z Y Wang,C L Wei,D H Wei,N Wu,Y M Wu,X M Xia,X X Xie,B Xin,G F Xu,H Xu,Yunpeng Xu,S T Xue,M L Yan,Fan Yang,H X Yang,Jianyi Yang,S D Yang,Y X Yang,M H Ye,Y X Ye,L H Yi,Z Y Yi,C S Yu,G W Yu,C Z Yuan,J M Yuan,Ying Yuan,Q Yue,S L Zang,Yong Zeng,B Y Zhang,C C Zhang,D H Zhang,H Y Zhang,J Y Zhang,L S Zhang,Q J Zhang,S Q Zhang,X M Zhang,Y J Zhang,Z Q Zhang,D X Zhao,J W Zhao,M G Zhao,P P Zhao,W R Zhao,X J Zhao,Y B Zhao,H Q Zheng,J P Zheng,L S Zheng, Z P Zheng,X C Zhong,B Q Zhou,G M Zhou,Li Zhou,N F Zhou,K J Zhu,Q M Zhu,Y S Zhu,Z A Zhu,B A Zhuang,B S Zou

Physics Letters B（2005）

Cited 56|Views40

No score

Abstract

The absolute branching fraction for the decay D+→K¯0e+νe is determined using 5321±149±160 singly tagged D− event sample from the data collected around 3.773 GeV with the BES-II detector at the BEPC collider. In the system recoiling against the singly tagged D− mesons, 34.4±6.1 events for D+→K¯0e+νe are observed. Those yield the absolute branching fraction to be BF(D+→K¯0e+νe)=(8.95±1.59±0.67)%. The ratio of the two partial widths for the decays of D0→K−e+νe and D+→K¯0e+νe is determined to be Γ(D0→K−e+νe)/Γ(D+→K¯0e+νe)=1.08±0.22±0.07.

Translated text

Key words

Branching fraction,Electron–positron annihilation,Meson,Collider,Nuclear physics,Atomic physics,Physics,Width ratio

AI Read Science

Must-Reading Tree

Example

Generate MRT to find the research sequence of this paper

Chat Paper

Summary is being generated by the instructions you defined